Whatever the case may be at ORD, it is quite clear that Amex is dedicated to the aggressive expansion of its Centurion Lounge footprint.

I seem to recall someone posting zoning documents related to the upcoming Chase Sapphire Lounge at Logan (BOS) that suggested Amex only narrowly missed out on securing that space for itself. My point is, I am sure that if Amex could jam a CL into ORD, they would.